Beginning January 1, 2026, a new update to the Ontario Fire Code will require carbon monoxide detectors to be installed on every floor of a home that contains fuel-burning appliances or an attached garage. The change is intended to improve early detection and reduce the risk of carbon monoxide exposure in residential buildings.
What the New Rule Means for Homeowners
Under the updated Fire Code, carbon monoxide detectors must be placed on each level of a residence, not only near sleeping areas as previously required.
This applies to homes with fuel-burning sources such as gas furnaces, water heaters, fireplaces, wood stoves, or propane appliances. Homes with attached garages are also included, as carbon monoxide from vehicle exhaust can enter living spaces.
Why the Change Was Made
Carbon monoxide is a colourless and odourless gas that can be extremely dangerous and even fatal when inhaled. Because it cannot be detected by smell or sight, alarms are the only reliable way to alert residents to its presence.
Fire officials say installing detectors on every floor increases the likelihood that occupants will hear an alarm quickly and respond before exposure becomes serious.
Which Homes Are Affected
The updated requirement applies to most residential properties, including:
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Detached and semi-detached homes
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Townhouses and duplexes
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Apartments and condominiums
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Cottages and seasonal residences
Landlords and property owners are responsible for installing and maintaining the required alarms, while tenants are expected to notify owners if alarms are missing or not working.
What You Should Do Before January 1, 2026
Homeowners should review how many carbon monoxide detectors they currently have and where they are located. If detectors are only installed near bedrooms, additional units may be required on other levels such as basements or main floors.
All alarms should be certified, installed according to manufacturer instructions, and tested regularly. Batteries should be replaced as recommended to ensure proper operation.
With the updated Fire Code taking effect on January 1, 2026, now is a good time for homeowners to prepare. Installing carbon monoxide detectors on every floor provides broader protection and greater peace of mind, helping to keep households safer year-round.